Question 1
Which statement about waves is correct?
A
Waves do not transfer either energy or matter.
B
Waves transfer both energy and matter.
C
Waves transfer energy without transferring matter.
D
Waves transfer matter without transferring energy.
Question 2
In the diagram, the mountaineer can hear the stream although he cannot see it. When he is closer to the gully, he can both hear and see the stream. When he is further from the gully, he can neither hear nor see the stream.
Which statement is not correct?
A
As he approaches the gully edge, he hears first the short wavelength, higher frequencies and then the long wavelength, lower frequencies.
B
As he approaches the gully edge, the sound becomes louder.
C
He hears the stream because some of the sound is diffracted.
D
He hears the stream because some of the sound is reflected from the opposite wall of the gully.
Question 3
A large hill blocks the direct path between a transmitter of radio waves and a receiver, as shown.
The receiver picks up the signal from the transmitter even though the radio waves do not travel through the hill.
Which row is correct?
A possible way
for this to happen is
A stronger signal is
received using
diffraction round the hill.
longer wavelengths.
diffraction round the hill.
shorter wavelengths.
refraction round the hill.
longer wavelengths.
refraction round the hill.
shorter wavelengths.
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